yeah because companies are trying to save money and got rid of them before most people had a cellphone (so they don't know what they are missing)
1. more screen
2. smaller phone (unless it contradicts rule 1)
3. longer battery life (unless it contradicts rule 1 or 2)
It's really that simple. Apple fought against this a long time before they gave up and realized the truth. They shipped smaller phones long after Android had moved on to larger screens.